# Hexasodium hexametaphosphate

CAS: 10124-56-8
PubChem CID: 24968
InChIKey: GCLGEJMYGQKIIW-UHFFFAOYSA-H
Wikidata: Q3116769
Molecular formula: Na₆O₁₈P₆
Molar mass: 611.77 g/mol
IUPAC: hexasodium;2,4,6,8,10,12-hexaoxido-1,3,5,7,9,11-hexaoxa-2lambda5,4lambda5,6lambda5,8lambda5,10lambda5,12lambda5-hexaphosphacyclododecane 2,4,6,8,10,12-hexaoxide
SMILES: [O-]P1(=O)OP(=O)(OP(=O)(OP(=O)(OP(=O)(OP(=O)(O1)[O-])[O-])[O-])[O-])[O-].[Na+].[Na+].[Na+].[Na+].[Na+].[Na+]
InChI: InChI=1S/6Na.H6O18P6/c;;;;;;1-19(2)13-20(3,4)15-22(7,8)17-24(11,12)18-23(9,10)16-21(5,6)14-19/h;;;;;;(H,1,2)(H,3,4)(H,5,6)(H,7,8)(H,9,10)(H,11,12)/q6*+1;/p-6
PSA: 296 A^2
Hydrogen bond donors: 0
Hydrogen bond acceptors: 18
Rotatable bonds: 0
Heavy atoms: 30
3D structure: 30 atoms, 24 bonds

## About the compound

Hexasodium hexametaphosphate is a chemical compound registered under CAS number 10124-56-8. Molecular formula: Na₆O₁₈P₆. Molar mass: 611.77 g/mol. The full systematic IUPAC name is: hexasodium;2,4,6,8,10,12-hexaoxido-1,3,5,7,9,11-hexaoxa-2lambda5,4lambda5,6lambda5,8lambda5,10lambda5,12lambda5-hexaphosphacyclododecane 2,4,6,8,10,12-hexaoxide. The molecule contains 30 atoms connected by 24 chemical bonds. 
Chemical data comes from the PubChem (NIH), ChEMBL (EBI) and NIST WebBook databases. GHS statement translations comply with the CLP Regulation (EC 1272/2008). Interactive 3D model and 2D skeleton available at: https://molgod.org/molecule/10124-56-8/


## Synonyms

  - Hexasodium hexametaphosphate
  - Chemi-charl
  - Calgon S
  - Calgon (old)
  - Caswell No. 772
  - Hexasodium metaphosphate
  - Phosphate, sodium hexameta
  - FEMA 3027
  - HSDB 5053
  - Natrium hexametaphosphat
  - N40N91DW96
  - EINECS 233-343-1

## Data sources

  - PubChem CID 24968: https://pubchem.ncbi.nlm.nih.gov/compound/24968
  - Wikidata: https://www.wikidata.org/wiki/Q3116769
  - NIST WebBook: https://webbook.nist.gov/cgi/cbook.cgi?ID=10124-56-8
  - ChEMBL: https://www.ebi.ac.uk/chembl/g/#search_results/all/query=10124-56-8

---
Standalone HTML page: https://molgod.org/molecule/10124-56-8/
Markdown version: https://molgod.org/molecule/10124-56-8.md
JSON API: https://molgod.org/wp-json/molgod/v1/molecule/10124-56-8
Last updated: 2026-10-17
Generator: MOL-GOD v3.12.33